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Bug #75974 has an IPv6 assigned but web server is unreachable
Submitted: 2018-02-16 21:46 UTC Modified: 2018-10-27 16:57 UTC
From: receiver at timreeves dot de Assigned: tstarling (profile)
Status: Closed Package: Systems problem
PHP Version: 7.2.2 OS: Any
Private report: No CVE-ID: None
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 [2018-02-16 21:46 UTC] receiver at timreeves dot de
As stated, the website has an IPv6 address assigned in DNS - 2001:660:7401:211::36 - but is not reachable via webserver.

I discovered this the hard way: I tried to install software on a Debian-8 Server which does this while checking requirements:


On Debian 8 (Hetzner, Germany, with Plesk Onyx) this hangs until the webserver times out, the software cannot be installed. On Ubuntu Servers and other Webhosting Packages this does not occur, either becuae IPv4 is preferred or the OS does not hang on IPv6 but soon goes to IPv4.

I cannot find any way around this using PHP open URL, But id is possible to get around it using curl in PHP and passing CURL_IPRESOLVE_V4 option - that works fine.

Test script:
--------------- and enter


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 [2018-02-20 14:46 UTC]
-Package: Website problem +Package: Systems problem
 [2018-02-23 06:46 UTC] ssv dot uia at mail dot ru
URL does not open? but open.

Result: a:4:{i:7;a:3:{s:12:"announcement";b:1;s:6:"source";a:3:{i:0;a:4:{s:8:"filename";s:17:"php-7.2.2.tar.bz2";s:4:"name";s:19:"PHP 7.2.2 (tar.bz2)";s:6:"sha256";s:64:"f841ac58e17471f2241ea892b34edb01dc9b93ad9f661ffe4e3f1f476a8f4aee";s:4:"date";s:10:"1 Feb 2018";}i:1;a:4:{s:8:"filename";s:16:"php-7.2.2.tar.gz";s:4:"name";s:18:"PHP 7.2.2 (tar.gz)";s:6:"sha256";s:64:"5963df05fec21927c03fe9f7bf379be2d1eacde6c0f9dcde6143c7133e55abd4";s:4:"date";s:10:"1 Feb 2018";}i:2;a:4:{s:8:"filename";s:16:"php-7.2.2.tar.xz";s:4:"name";s:18:"PHP 7.2.2 (tar.xz)";s:6:"sha256";s:64:"47d7607d38a1d565fc43ea942c92229a7cd165f156737f210937e375b243cb11";s:4:"date";s:10:"1 Feb 2018";}}s:7:"version";s:5:"7.2.2";}i:5;a:4:{s:12:"announcement";b:1;s:6:"source";a:3:{i:0;a:4:{s:8:"filename";s:18:"php-5.6.33.tar.bz2";s:4:"name";s:20:"PHP 5.6.33 (tar.bz2)";s:6:"sha256";s:64:"07f696a9761dcd839e2045c95c3a4d2ffb52c54417477cca9d30a14975b831cc";s:4:"date";s:11:"04 Jan 2018";}i:1;a:4:{s:8:"filename";s:17:"php-5.6.33.tar.gz";s:4:"name";s:19:"PHP 5.6.33 (tar.gz)";s:6:"sha256";s:64:"bedfac81cfaa25961812a1aec458c4109411a14991b43a416343ffb830b8da6a";s:4:"date";s:11:"04 Jan 2018";}i:2;a:4:{s:8:"filename";s:17:"php-5.6.33.tar.xz";s:4:"name";s:19:"PHP 5.6.33 (tar.xz)";s:6:"sha256";s:64:"9004995fdf55f111cd9020e8b8aff975df3d8d4191776c601a46988c375f3553";s:4:"date";s:11:"04 Jan 2018";}}s:4:"date";s:11:"04 Jan 2018";s:7:"version";s:6:"5.6.33";}i:4;a:6:{s:12:"announcement";a:1:{s:7:"English";s:19:"/releases/4_4_9.php";}s:6:"source";a:2:{i:0;a:4:{s:8:"filename";s:17:"php-4.4.9.tar.bz2";s:4:"name";s:19:"PHP 4.4.9 (tar.bz2)";s:3:"md5";s:32:"2e3b2a0e27f10cb84fd00e5ecd7a1880";s:4:"date";s:14:"07 August 2008";}i:1;a:4:{s:8:"filename";s:16:"php-4.4.9.tar.gz";s:4:"name";s:18:"PHP 4.4.9 (tar.gz)";s:3:"md5";s:32:"9bcc1aba50be0dfeeea551d018375548";s:4:"date";s:14:"07 August 2008";}}s:7:"windows";a:1:{i:0;a:4:{s:8:"filename";s:19:"";s:4:"name";s:21:"PHP 4.4.9 zip package";s:3:"md5";s:32:"7395068d5489a9f8abf50c6e4b48622f";s:4:"date";s:14:"07 August 2008";}}s:4:"date";s:14:"07 August 2008";s:6:"museum";b:1;s:7:"version";s:5:"4.4.9";}i:3;a:5:{s:4:"date";s:11:"20 Oct 2000";s:6:"source";a:1:{i:0;a:3:{s:8:"filename";s:17:"php-3.0.18.tar.gz";s:4:"name";s:22:"PHP 3.0.18 Source Code";s:3:"md5";s:32:"b4b8f7f1151ce66d5f3910a066651133";}}s:7:"windows";a:1:{i:0;a:3:{s:8:"filename";s:20:"";s:4:"name";s:25:"PHP 3.0.17 Windows binary";s:3:"md5";s:32:"29029ac1c3c2075dce38bbd804c42f72";}}s:6:"museum";b:1;s:7:"version";s:14:"3.0.x (latest)";}}
 [2018-02-24 16:42 UTC] receiver at timreeves dot de opnes, as stated above, but via IPv4. The problem is: has no IPv6 address (AAAA) but does have an AAAA.
 [2018-02-25 01:44 UTC]
Keep in mind that is geodns'ed. So when you say has a specific AAAA record, it is actually the specific mirror you are being geodns'ed to that you are talking about.
 [2018-10-27 16:57 UTC]
-Status: Open +Status: Closed -Assigned To: +Assigned To: tstarling
 [2018-10-27 16:57 UTC]
Seems fixed now. has IPv6 address 2a02:cb41::7 has IPv6 address 2001:470:0:b9::4047:a405

$ ping6 2a02:cb41::7
PING 2a02:cb41::7(2a02:cb41::7) 56 data bytes
64 bytes from 2a02:cb41::7: icmp_seq=1 ttl=49 time=71.2 ms

$ ping6 2001:470:0:b9::4047:a405
PING 2001:470:0:b9::4047:a405(2001:470:0:b9::4047:a405) 56 data bytes
64 bytes from 2001:470:0:b9::4047:a405: icmp_seq=1 ttl=60 time=1.50 ms says it works.
 [2018-10-27 17:01 UTC]
2001:660:7401:211::36 also works, using

$ curl -vvv -x '[2001:660:7401:211::36]:80'
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